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12
Turn OFF the main power switch to the indoor unit and
the outdoor unit and wait for at least minutes before
electrical wiring work or a periodical check is performed.
Check to ensure that the indoor and outdoor fans have
stopped before electrical wiring or a periodical check.
Protect the wires, drain pipe, electrical parts, etc. from
rats or other small animals. If no protection is arranged,
rats may gnaw at unprotected parts and at the worst, a
fire will arise.
Avoid the contact of wires with the refrigerant piping,
sheet metal edges and electrical components in unit.
Otherwise, the wire may be damaged or even cause fire.
Use ELB with medium sensing rate (earth leakage
breaker with action time being equal to 0.1 seconds or
less). The failure to do so may result in electric shock or
fire.
The wires must be firmly secured. External force applied
to terminals may cause a fire.
Never connect the power terminal block for air
conditioner to power cord. At the indoor unit side of air
conditioner, power wiring can be extended through a
power distribution box. Be sure to calculate the wiring
capacity carefully, since excessively low wiring capacity
may frequently cause fire.
Do not start the system before all check points are
thoroughly checked.
Fix the wire clamp body and its nuts to the wiring hole
of electric box using a torque of 0.74~0.89ft.lbs
(1.0~1.2N.m).
Connect the cable of wired control to the connectors
on the printed circuit board in electric box through the
wire clamp and wiring hole.
Connect power cord and the communication cables of
indoor and outdoor units to corresponding terminals of
electric box in the same way.
Upon completion of electrical wiring, the wire clamp nut
shall be manually tightened to block condensate and
insects.
7.
Electrical Wiring
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Wrap the accessory packing around the wires, and plug
the wiring connection hole with the seal material to
protect the product from any condensate or insects.
Tightly secure the wires with the cord clamp inside the
indoor unit.
Secure the cable of wired control using the cord clamp
inside the electric box.
Tighten screws to the following torques.
7.1 General Check
Make sure that the field-selected electrical components
(main power switches, circuit breakers, wires, conduit
connectors and wire terminals) have been properly
selected according to the electrical data given in
"Technical Catalog I". Make sure the components comply
with National Electrical Code (NEC).
Check to ensure that the power supply voltage is within
±10% of the rated voltage.
Check the capacity of the electrical wires. If the power
source capacity is too low, the system cannot be started
due to the voltage drop.
Check to ensure that the ground wire is connected.
7.2 Electrical Wiring Connection
The electrical wiring connection for the indoor unit is shown
in Fig. 7.1.
M4:
M5:
M6:
M8:
M10:
0.74~0.96 ft.·lbs(1.0
~
1.3N·m)
1.48
~1.77
ft
.
·lbs(2.0
~
2.4N·m)
6.64~8.11 ft.·lbs(9.0
~
11.0 N·m)
13.28~16.96 ft.·lbs(18.0
~
23.0 N·m)
2.95~3.69 ft.·lbs(4.0
~
5.0 N·m)
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